The latest DIN standard sheet version applies to all parts made to DIN standards. Variations on dimensions without tolerance values are according to "DIN ISO 2768-mk". 指在车间通常加工条件下可保证的公差。采用一般公差的尺寸，在该尺寸后不需注出其极限偏差数值。
External 外牙 (Ext.) / Internal 内牙 (Int.)
Below is the comprehensive Inspection Method reference Chart
As a general guideline, the higher the class number, the tighter the fit. For example, an assembly which mates class 1A and 1B threads will have a looser fit than an assembly having class 3A and 3B threads. Classes 1A and 1B are infrequently used, but they do have their applications. They are ideally suited [...]
There are basically two methods to produce a blind rivet body. One is by cold heading wire and extrude a rivet body and the other method is by stamping and forming the blind rivet body from sheet raw material. These two methods of producing rivet bodies are completely different methods of manufacturing and tooling or [...]
中文 (中国)